The intensity at which the presence of a stimulus can be detected 50 percent of the time is called the ______
a. absolute threshold c. difference threshold
b. just noticeable difference d. psychophysical threshold
A
Psychology
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What is one likely explanation for many optical illusions?
What will be an ideal response?
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Studies of the immune system in animals have found that stressors such as crowding
a. can lead to increased levels of immune system activity. b. can activate the release of aggressive pheromones. c. can increase levels of serotonin and dopamine. d. can reduce various aspects of immune system activity.
Psychology